v3.26.1
Stockholders' Equity and Non-Controlling Interests - Narrative (Details)
$ / shares in Units, $ in Thousands
 1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Nov. 06, 2021
USD ($)
Nov. 05, 2021
USD ($)
Feb. 28, 2026
USD ($)
Apr. 30, 2022
USD ($)
shares
Jun. 30, 2026
USD ($)
$ / shares
shares
Jun. 30, 2025
USD ($)
$ / shares
shares
Jun. 30, 2026
USD ($)
extension
$ / shares
shares
Jun. 30, 2025
USD ($)
$ / shares
shares
Dec. 31, 2025
USD ($)
May 31, 2025
USD ($)
Equity Incentive Plans                    
Authorized repurchase of common stock     $ 400,000              
Repurchase program, period in force     1 year              
Common stock repurchased (in shares) | shares         581,795   1,708,338      
Common stock repurchased         $ 10,004   $ 29,940      
Repurchase of remaining common stock         370,100   370,100      
Contributions from non-controlling interests             1,426 $ 1,489    
Net income         689 $ 690 2,887 1,115    
Net income (loss) attributable to non-controlling interests         $ 8,448 $ 4,882 $ 13,992 $ 8,728    
CMBS JV                    
Equity Incentive Plans                    
Subsidiary, ownership percentage, parent         51.00%   51.00%      
Common stock                    
Equity Incentive Plans                    
Redemption of Class A Units (in shares) | shares           64,000   64,000    
Class A Units                    
Equity Incentive Plans                    
Number of units outstanding (in shares) | shares         9,600,000   9,600,000      
Class A Units | Common stock                    
Equity Incentive Plans                    
Redemption of Class A Units (in shares) | shares         0 100,000 0 100,000    
Woodstar II Portfolio | Class A Units                    
Equity Incentive Plans                    
Net income (loss) attributable to non-controlling interests         $ 4,600 $ 4,600 $ 9,300 $ 9,300    
Subsidiaries | Woodstar II Portfolio                    
Equity Incentive Plans                    
Conversion of stock ratio             1      
Subsidiaries | Woodstar II Portfolio | Class A Units                    
Equity Incentive Plans                    
Shares issued (in shares) | shares             10,200,000      
Right to receive additional shares (in shares) | shares             1,900,000      
Subsidiaries | Woodstar II Portfolio | Class A Units | Non- Controlling Interests                    
Equity Incentive Plans                    
Redemption of units             $ 205,700   $ 205,700  
Woodstar Fund                    
Equity Incentive Plans                    
Percentage of interest sold   20.60%                
Contributions from non-controlling interests $ 214,200 $ 216,000                
Initial term             8 years      
Number of extension options | extension             2      
Extension term             1 year      
CMBS JV                    
Equity Incentive Plans                    
Non-controlling interest         $ 88,000   $ 88,000   $ 89,300  
CMBS JV | Joint Venture Partner                    
Equity Incentive Plans                    
Ownership percentage         49.00%   49.00%      
CMBS JV | Woodstar II Portfolio | Class A Units                    
Equity Incentive Plans                    
Net income (loss) attributable to non-controlling interests         $ 1,300 $ (1,600) $ 700 $ (2,300)    
Starwood Property Trust, Inc. Equity Plan and Manager Equity Plan                    
Equity Incentive Plans                    
Number of shares of authorized for issuance (in shares) | shares       18,700,000            
Common stock available for future grants (in shares) | shares         8,200,000   8,200,000      
Employee Stock                    
Equity Incentive Plans                    
Purchase price of fair market value (as a percent)       85.00%            
Maximum purchase value during calendar year, per employee       $ 25            
Number of shares of authorized for issuance (in shares) | shares       2,000,000            
Number of shares issued for future grants (in shares) | shares         19,172 17,087 103,553 82,025    
Purchase price (in dollars per share) | $ / shares         $ 14.30 $ 16.94 $ 14.82 $ 16.94    
Share-based expense         $ 100 $ 100 $ 300 $ 300    
Common stock available for future issuance (in shares) | shares         1,500,000   1,500,000      
ATM Agreement                    
Equity Incentive Plans                    
Authorized value of stock under ATM agreement                   $ 500,000
Number of shares issued (in shares) | shares         0 1,561,634 0 1,561,634    
Gross proceeds           $ 31,600   $ 31,600    
Price (in dollars per share) | $ / shares           $ 20.22   $ 20.22    
Payment of equity offering costs           $ 500   $ 500